Publication: Up-scalable synthesis of size-controlled NiSe nanoparticles using single step technique
Date
2022
Authors
Al-Hada N.M.
Kasmani R.M.
Kasim H.
Al-Ghaili A.M.
Saleh M.A.
Baqiah H.
Al-Asbahi B.A.
Yang J.
Noorazlan A.M.
Li Q.
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier Editora Ltda
Abstract
Pure NiSe nanoparticles were successfully produced using an adapted thermal treatment technique and an alternate nitrogen flow. Throughout a range of calcination temperatures of 500 �C-800 �C, a number of techniques were utilised in order to examine the optical, structural and magnetic characteristics of the attained NiSe nanoparticles. Ultraviolet-visible absorption spectrophotometry was employed to ascertain the optical characteristics. These evidenced a reduction in the NiSe nanoparticle conduction band with elevated calcination temperatures, i.e. from 3.58 eV to 3.37 eV at 500 �C and 800 �C, respectively. This was attributed to a higher degree of attraction between the conduction electrons and the metallic ions with rising particle dimensions, equating to a larger atom population comprising the metal nanoparticles. This means that the findings can be applied to a wide range of energy applications. The lack of impurities within the produced NiSe nanoparticles was verified utilising Fourier-transform infrared spectroscopy and energy dispersive X-ray analysis. At calcination temperatures of ? 500 �C, powder X-ray diffraction demonstrated that the specimen, amorphous at room temperature, had undergone conversion into hexagonal crystalline nanostructures. Transmission electron microscopy confirmed the evolution of size NiSe nanoparticles; mean particle dimensions increased from 21 nm to 54 nm at calcination temperatures of 500 �C and 800 �C, respectively. Electron spin resonance spectroscopy, used to identify the magnetic properties, supported the presence of unpaired electrons. � 2022 The Author(s).
Description
Electron spin resonance spectroscopy; Energy dispersive X ray analysis; Energy gap; Fourier transform infrared spectroscopy; Heat treatment; High resolution transmission electron microscopy; Magnetic moments; Metal nanoparticles; Nanomagnetics; Particle size analysis; Synthesis (chemical); Thermoanalysis; X ray diffraction analysis; Calcination temperature; Energy bandgaps; Magnetic characteristic; Nise nanoparticle; Optical characteristics; Particle dimensions; Scalable synthesis; Structural characteristics; Thermal treatment technique; Treatment techniques; Nickel compounds